If C = 25" then r = 3.979 inches
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A circle with a circumference of 25 inches has a radius of about 3.979 inches.
If the circumference of a circle is 24 inches the radius is: 3.82 inches.
C = circumference, d = diameter, r = radius C = Pi * d 25 in. = 3.1415 * d d = 25 in./3.1415 d = 7.9577 in. r = d/2 r = 7.9577 in./2 r = 3.979 in. Therefore, a circle with a circumference of 25 inches has a radius of about 4 inches.
The circumference of a circle with a radius of 10 inches is about 62.83 inches.
A circle with a radius of 15 inches has a circumference of: 94.2 inches.